We provide new constructions of several fundamental pseudorandom objects. Loosely speaking, these constructions obtain exponential improvements in efficiency compared to previous constructions with comparable randomness complexity. Our measure of efficiency is the number of word operations, as captured by the well-established unitcost word RAM model. Our main results are the following: 1. A fam...

Log production is the main target of new short-rotation poplar plantations, and their profitability depends on maximizing log yield. The authors set up a controlled experiment to determine yield increase obtained by shortening length specification from 4 2 m, quantify additional cost incurred this change. indicated that reducing specifications allows significant (+40%) in low-yielding (<25 B...

fracture system in carbonate reservoirs is very complex. understanding the features of fractures such as dip, strike and the other parameters can help to distinguish the behaviour of reservoir in any exploration and production plan. image log is the best way to investigate feature planes like fracture and bedding. image log in one of drilled well #10x393 of bangestan reservoir in gachsaran oilf...

All nonabelian finite simple groups of Lie type of rank n over a field of size q, with the possible exception of the Ree groups G2(q), have presentations with at most 49 relations and bit-length O(log n+log q). Moreover, An and Sn have presentations with 3 generators, 7 relations and bit-length O(log n), while SL(n, q) has a presentation with 6 generators, 25 relations and bit-length O(log n + ...